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the engulfment of food particles with pseudopodia to form a food vacuole inside the cell. This is the process by which micro-organisms such as amoebae feed.
simple chemical substances needed by the body in relatively small amounts for normal growth and...
the natural resistances with which a person is born. It occurs because of a body's genetic make-...
a social structure in which different classes are determined by heredity.
biological classification group (taxon) for plants that are divided into classes.